| |
| // (C) Copyright Dave Abrahams, Steve Cleary, Beman Dawes, Howard |
| // Hinnant & John Maddock 2000. |
| // Use, modification and distribution are subject to the Boost Software License, |
| // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
| // http://www.boost.org/LICENSE_1_0.txt). |
| // |
| // See http://www.boost.org/libs/type_traits for most recent version including documentation. |
| |
| |
| #ifndef BOOST_TT_IS_UNION_HPP_INCLUDED |
| #define BOOST_TT_IS_UNION_HPP_INCLUDED |
| |
| #include <boost/type_traits/intrinsics.hpp> |
| #include <boost/type_traits/integral_constant.hpp> |
| |
| namespace boost { |
| |
| #ifdef BOOST_IS_UNION |
| template <class T> struct is_union : public integral_constant<bool, BOOST_IS_UNION(T)> {}; |
| #else |
| template <class T> struct is_union : public integral_constant<bool, false> {}; |
| #endif |
| |
| template <class T> struct is_union<T const> : public is_union<T>{}; |
| template <class T> struct is_union<T volatile const> : public is_union<T>{}; |
| template <class T> struct is_union<T volatile> : public is_union<T>{}; |
| |
| } // namespace boost |
| |
| #endif // BOOST_TT_IS_UNION_HPP_INCLUDED |
